New Solaris ACL Model

Previous versions of the Solaris OS supported an ACL implementation that was primarily
based on the POSIX ACL draft specification. The POSIX-draft based ACLs are used
to protect UFS files. A new Solaris ACL model that is based on
the NFSv4 specification is used to protect ZFS files.

The main differences of the new Solaris ACL model are as follows:

The model is based on the NFSv4 specification and is similar to NT-style ACLs.

This model provides a much more granular set of access privileges.

ACLs are set and displayed with the chmod and ls commands rather than the setfacl and getfacl commands.

Richer inheritance semantics designate how access privileges are applied from directory to subdirectories, and so on.